The wife's 68 Barracuda's wipers just stopped working. I replaced the switch with one I think is good. It was on my parts shelf so who knows if it is good. How do I trouble shoot this? If wifey ain't happy no one is!

This may be a stupid question.......Did you check the ground at the motor?

Or the switch ?

There was a Technical Service Bulletin and a parts counter fixer upper kit.

The parts went inside the motor housing and maybe had something to do with the reverse/park circuit and mechanicals.

Sorry, can't remember if this TSB and kit was for a parking problem or a non-operating problem. I installed the kit in my Barracuda in the early 70s.

If you need a 68 FSM/wiring schematic, PM me. You could jumper 12v directly to the motor without the switch, guided by the schematics. This would tell you if the motor works by itself skipping the switch. The schematic shows 4 wires for both variable speed and 2-speed wipers, brown, red, dark green, and dark blue in the engine compartment, but you will have to correlate this to the instrument panel schematic and switch to see which wire(s) you need to jumper.

If you havn't tested anything.......... hit the motor a couple times with a hammer. Works quite often !

Thanks for all the answers. I will let you know how it turns out when I get to it next week.

The TSBs are worth a read and may help. See:

http://www.hamtramck-historical.com/library.shtml

and scroll to bottom. Read "Understanding and Using..." first.

The Plymouth TSB for 1970 in Chapter 8 Electrical has testing procedures for wipers, as does, of course, the FSM. There are other wiper TSBs for other years, including 69.